Charles l



(No Model G. L. CLARKE.

INDIGATING APPARATUS.

No. 341571,. I I Patented Aug. 17; 1886.

99mm gwuewtoz N 02a 1661. 0141728,.

UNIT STATES PATENT- OFFICE,

CHARLES I).

CLARKE, OF EAST oiiA'Nen, NEW JERSEY, ASSIGNOR TO THE TELEMETER COMPANY, OF NEV YORK, N. Y.

F'INDICATING APPARATUS,

-'.-.-?ECIPICATI ON forming part of Letters Patent No. 347,571 dated August 17, 1886.

Application filed lilay Q1, 1886. Serial N01 $102,833. (No model.) v

To' all uhom. it may-concern} Be it known that 1, CHARLES L. CLARKE, acitizen of the United States, residing in East Orange, in the county of Essex and State of 5 New Jersey, have invented certain new and useful Improvements in Indicating Apparatus,

- of which the following is a specification. The invention relates .to the class of apparatus employed for indicating undue varia- IO tions in the expenditure of various forcessuch, for instance, as gas andwater pressures, heat, 8:0.

The object of the invention is to provide means for giving an indication when the maxi- ,mum or ininimumlimit is reached, and cans ing an alarm to be sounded i.n a convenient reliable manner. v The invention consists in applying to a circuitelosing point adapted to he moved in one direction or the other by variations in the force or pressure to be'liniited two contact points which are adjustable in their positions with reference. to :the' circnibclosing point. Two conductors leading therefrom respect- 2 5 ively include electro-magnets adapted to complete permanent shunt-circuits around the.

points, and other electro-magn'ets adapted to respectively operate devices for indicating whether the force is in excess or at a mini 0-11mm. .Theseiudicatingdevices when operated serve to close a circuit through an alarm-bell or other audible signaling device, and at the same time :to divert the currentof the battery 'from the primary circuit-controlling; device. 3 The accompanying drawing is a diagram, illustrating the general organization of .the apparatus. Y v lteferringto the figure, 0 represents an arm capable of moving'in one direction or the op- 0 posite under the influence of variations in temperature, the height of water in a reservoir,

or any'other similar variable quantities. Thearm 0 carries two circuit-closing .points, 0 c. Twocontactarms, O and G "are applied to the 5 armC, and are adjustable towarda'nd from the same. They respectively. carry contact points -e and-c The arm 0 is connected by aeonductor, 1, with the earth at G. The arm (3 is-eon'ueeted by conductor 2 through thenormillyv rests against back contact-stop, b,-

but when the magnet is vitalizcd'the armature is drawn against the front stop, d- The stop (1 is connected .by condnctortt with conductor 2 ate. point, 5. The armature a" is connected by a conductor, 6, with the'couductor 1, leading from the arm C. \Vhen, therefore, the "elcctro ma-gnet A is vita1ized,a shunt-circuit, is established around the pointscand c,through which the circuit is first closed, and the elec-. tro magnet remains vitalized even though the contact-points be separated. For the purpose of preventing a on rr ent of u nuecessary strength from traversing the more delicate points 0 0, a resistance, It, is ineludcdin the conductor 2 between the point 5 and the arm-C.

The electro-magnet A is provided with an armature, a and'stops I)" and (1, similar to electro-inagnet A. The step d' is connected by a conductor, 7, with the conductor 3 at a point, 8, and the armature or is connected by a conductor, 9, with the conductor 6. lVhen, therefore,'tlie electro-magnct A is vitalized by contact of the point' a with the point 0', a shunt-circuit is closed around these points. A resistance, It, is inserted in thecondu'ctor 3 for the same purpose as resistance R in the conductor 2. The main line L leads'at a distaut station through an electro-maguet, E, and the line L through the magnet E. The conductors l1 and 12, leading-from these magnets, unite-with a conductor, 13, leading from one pole of a battery, 0. The other pole of this battery is connectedby a conductor, 15, with the earth at G. The electro-maguet E is provided with an armature, e, which is normally engaged by a latch upon an annuneiator-drop, h. The latch and the end of the armature have beveled contact-surfaces,which, while they serve to hold the aununciator-drop in its-normalposition'so long .as the electromagnetis not 'vita'lized', will, however, release the drop when the armature is attracted'by the,

electro-magnet. The 'annuneiator-drop, when I plied. The electromagnet E 13, and points mand m with the conductor 15. 5

thus released, gives a visual signal, serving to i udicete the line L, and thus to direct attention to the fact that one limitsay the maximum-is reached by.- the force to which.the apparatus is apis in like incur ner equipped with on armature, 6 a. latch, f an nn11unciator-drop, If, operating in the sa-memanner under the influence ofcurrents over the line L? for the purpose of giving an audible signal when either device is operated.

Each drop is provided witlra pair of contactpoints, as shown at mand n and m n, respect ively. The point on is'normally away from' the point 'n, but the weight, of the drop h, which falls against it when released, will press the arm, carrying the .point m against thepoint it. In a like manner the point onis pressed against the point 11" by the drop Z13. The poiutsn and n are respectively connected by conductors 16 and 17 with the conductor are connected byrthe electromagnetic bell, .Vhen, therefore, the contactqaoints 'of either pair touch each other, a circuit will be closed through-the bell and an audible signal given. able in some instances that the clrcuitof the main line should be interrupted immediately after the annnnciator-drop has been actuated and the circuit through the bell alone should remei u completed, the circuit nuty be arranged as'indicuted'in dotted lines, to be normally completed through the drop turc e, the section of the conductor 13 between conductor 18 through an the points 2i and 22, from which the dotted conductors -=19 and 20 lead, being removed. It is not alwaysessentinl that the l)c ll-circuit 18 be employed, but u l cll may be included in conductor 13, usindical cd in dotted-lines atlll, its circuitbeing through the main line L or L". The clcctro-mugnets A and A would then preferably be constructed sulliciently slow to prevent tlieir armuturcs from falling Why by reason of the short interruptions due to tl e'vihrw tion of the armature of the bell-magnet, Icluim as my invention-' 1. The combination, with :i. circuit-controlling device operated by variations of force o'r pressure, of two circuits, the one 'or the other presence of the current upon'tlie As it is desir-' h and the mum of which is completed accordingly as a maxicuits, shunt-circuits around said circuit-controlling device operated by said electro-magnets, respectively, two cnnunciator devices respectively operated by currents through said circuits, asignaling device, and a circuit therethrough completed by the operation of either of said annuncictor devices.

2. The combination of a circuit-closing device consisting of an arm movable between two limits, contact-points at said limits, two mair lineslen ding from said contact-points, respec ively, to one pole of a battery, the other pole of which is connected with the circuitclosing arm, two electro-magnets included in each of said lines, one of said electro-magnets'in each ofsaid lines serving when operated to close a shunt-circnit around the circuitcontrolling device, ondthe other to operate a corresponding anuunciator device, substantially as described. i

3. The combination,snbstcntially as hereinbefore set forth, with c device responding to variations in a variable quantity, of two circuits, the one or theother of which'is closed at thclimitof the variations in u correspond iiig direction, ively included in said circuits, an audible Sig-- naling device, and means for closing a, circuit through the same by theoperation of either indicating device. r

4. The combination, substantially. as hereinhcforc set forth, of u movable circuit-con tro'ller, two main lines, through one or the other ofwhich a. circuit is completed at predetermined points in the movement of said cireu it-controllcr, an unnuncintor in each circuit, it local circuit closed by the notion of either :mnuncintor', and an alarm device included in the local circuit.

-in testimony whereof I have hereunto subscribed my name this 12th day of May, A. D.

CHAS. 'L. CLARKE. I

\Vitnessesf l-inonlnn iE. DAVIDSON, CHARLES A. TERRY.

two indicating devices, respect 

